Electric clpck



(ModeL) 2 Sheets-Sheet 1.

- 0. E. TRASK.

ELEGTRIO GLOGK.

k Patented Nov. 15,1881.

WITNESSES INVENTOR am I fiwa I BY Mfg ATTORNEYS.

(ModeL) 2 Sheets-Sheet 2..

' G. E. TRASK.

ELECTRIC OLOGK. No. 249,699. I Patented Nov. 15,1881.

Z WITNESSES: v INTVENTOR:

bf x /Zm I ATTORNBYS.,

UNITED STATES PATENT OFFICE.

CHARLES E. TRASK, OF HASTINGS, MICHIGAN.

ELECTRIC CLgOCK.

SPECIFICATION forming part of Letters Patent No. 249,699, dated November15, 1881.

Application filed May 11, 1881. Model.)

To all whom it may concern Be it known that 1, CHARLES E. TRASK, ofHastings, in the county of Barry and State of Miehigan,have invented anew and useful Improvement in Electric Clocks, of which the following isa specification.

My improvements relate to clock mechanism wherein the impulse is givenalternately by two magnets and the movement controlled by a pendulum.

The objects of the invention are to provide for ready and accurateadjustment, to obtain equal tension on the vibrating armatures, tosimplify the circuit-closing devices, and to obtain the requiredmovement of the impulse-lever by a limited movement of the armatures.

The invention consists in a combination of independently-pivotedarmatures and levers, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a rear elevation of clockmechanism embodying my invention. Fig. 2 is a vertical section of thesame. Fig. 3 is a side elevation, partially in section; and Fig. 4 is aplan view of the circuit-closing devices.

Similar letters of reference indicate corresponding parts.

In the clock-work shown, a is the central 0 second-hand arbor, fittedwith a ratchet-wheel, b, and with a loose pinion, c, and barrel 6?, for

v the minute hand, which pinion c is geared back to the arbor a bygearing on a secondary arbor, 6. These parts are carried by frames f ona suitable base, A.

B B are the electro-magnets, fixed on base A at any suitable angle, andwith their poles facing each other, separated only by the distancerequired for the armatures and primary lever.

g g are the armatures, and h is primary lever, hung on a rocking arbor,h, at a point below and midway between the magnets B, and extendingupward between the same. The arbor h of lever h is shown as hung onpivot screws or pins z, upon which pins the armatures g are hung by arms9, so that the armatures and lever are capable of independent movement.The pins 'i areshouldered, as shown in Fig. 3, so as to prevent anycontact of the arms g.

In lugs k k, that are fixed on the upper part move away from the leverwhen drawn to the magnets.

On the lever h is hung a pawl, m, engaging with the ratchet-wheel b ofthe clock-work and held thereto by weight or a spring. The upper end ofthe lever is formed or fitted with adouhie-inclined verge, a. A rockingarbor, 0, fitted contiguous to the upper end of lever h, is fitted withpallet-fingers pp, the points of which are in contact, or nearly so,with the verge n, at opposite sides. On arbor 0 is also attached alever, g, which, as shown, is bent to extend downward at the back of themechanism. At the lower end is hung a link, a", formed witha hook at itsouter end, for engagement with a pendulum (not shown) that will be hungon the center line of the clock-work.

The circuit-closin g devices are fitted beneath the bent upper end oflever q, as follows:

8 s are curved spring-arms attached to fixed studs s, and having theirmoving ends contiguous, but'not in contact.

tis a lever pivoted beneath springs s,and fitted with a contact-roller,t. The lower end of lever t is forked, to pass at opposite sides of apin, a, that projects from the lever q, so that by the vibration of thelatter the levert is moved first in. one direction and then in theother, and the contact-roller t thus moved in contact alternately withthe spring-armss s. The connecting-wires pass from the studs 8 to therespective magnets, as shown at o v, and the magnets connect also, bywires 10 w,with a bindingpost, w, to which one battery-pole will beconnected. A binding-post, a, on the frame of the clock-work serves forconnection of a wire to complete the circuit to the battery.

In operation, one magnet, being energized,at-

tracts its armature, and the two armatures beingconnected together bythe spring, they both move, and lever h is swung in that direction. Thismovement, acting through one of the pallet-fingers p, rocks shaft 0 andswings lever g, at the same time moving the pawl m back or forward, asthe case may be. The current being then shifted to the other magnet bythe movement of lever t, the armatures swing in the other direction andcarry lever h to the other extreme. The armatures being separately hung,and having a spring-connection, the spring is stretched at the firstmovement, and the lever is moved by recoil of the spring. The tensionwill be nearly equal at all times, and not affected by variationsinbattery-power. The arrangement of lever q in connection withrockingarbor 0 and pallets 1) allows ready adjustment for bringing thelever h and palletsin the properrelative position. A slight twist orbend given to lever q will effect any required adjust ment.

The angle at which the magnets are set may be varied as desired. Therange of movement of the armatures may also be varied, and the distancebetween the magnets needs to be no more than required for the movement.It is preferable to separate the parts sufficiently to prevent themagnetic attraction between the armatures.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent--- l. The combination, in an electric clock, ofthe primary lever it, provided with verge n, and which is hung at apoint below and midway between the magnets B, and fitted to actuate theclock mechanism, rocking arbor 0, carrying pallet-fingers p, thepemlulum-lever q, having link 1", and electro-magnets arranged tovibrate theprimary lever, substantially as shown and described.

2. The combination, in an electric clock, of the vibrating lever h,which is hung at a point below and midway between the magnets B, pawl m,ratchet-wheel b of the clock mechanism, verge a, rocking arbor 0,pallets p, and pendulum-lct'cr q, having link r, substantially as shownand described, for operation as set forth.

3. The combination, in an electric clock, ofmagnets,independently-hungarmatnresg,connecting-spring Z, and lever 71,titted to actuate the clock mechanism, substantially as shown anddescribed.

4. The combination, in an electric clock, of magnets, separately-hungarmatures 9, spring Z, lever h, provided with verge a, rocking arbor 0,pallctsp, and pendulum-lever q. substantially as shown and described,for operation as set forth.

5. In electric clocks, the springs 8, attached to fixed studs 3, andhaving their moving ends contiguous, but not in contact, and forkedlever it, provided with a contact-roller, t, in combination with thepcndulum-leverg and connecting-wires ot' the circuit, substantially asshown and described.

CHARLES EDWIh TRASK.

\Vitnesses:

SAMUEL W001), WILLIAM M. W001).

